Whatever actions the Lord commissions His people to do are right. His charges reflect His righteous character, and they give joy to those who obey them. “The precepts of the Lord are right, rejoicing the heart; The commandment of the Lord is pure, enlightening the eyes.” (Ps 19:8)
Jesus promised that obedience to His commands would bring joy. “If you keep My commandments, you will abide in My love; just as I have kept My Father’s commandments and abide in His love. These things I have spoken to you so that My joy may be in you, and that your joy may be made full.” (John 15:10-11)
The commandment of the Lord is His prescription or direction for doing His will. It is described as “pure.” God’s Word is undefiled and produces a pure life in those who obey it. God’s Word are “the sacred writings which are able to give you the wisdom that leads to salvation through faith which is in Christ Jesus. All Scripture is inspired by God and profitable for teaching, for reproof, for correction, for training in righteousness; so that the man of God may be adequate, equipped for every good work.” (2 Tim 3:15–17) We truly have no ability on our own to be equipped for every good work God prepared for us to walk in (Eph 2:10), unless we abide in Him.
Those who reject God’s Word and depend on their own wisdom for a meaningful life are perishing. “For it is written, ‘I will destroy the wisdom of the wise, and the cleverness of the clever I will set aside.'” (1 Cor 1:19)
“The precepts of the Lord are right, rejoicing the heart; The commandment of the Lord is pure, enlightening the eyes.” (Ps 19:8) With these words, David credits God’s Word with brightening the eyes of those whose eyes are dim. In other words, Scripture enlightens our minds to understand God’s Word and His will. Those who reject His mercy will someday regret their choice (Rev 20:11–15).
Instead of rejecting His mercy, we can have a relationship with our Lord and abide in Him and His Word: “Then Jesus said to those Jews who believed Him, ‘If you abide in My word, you are My disciples indeed. And you shall know the truth, and the truth shall make you free.” (John 8:31-32) And when we choose to abide in Him, we find protection in Him that we can find no where else. “Every Word of God is pure; He is a shield to those who put their trust in Him.” (Prov 30:5)